Process of finishing materials dyed with vat colors.



a ror all m ADOLF KERTESZ, 0F MAINKUB, NEAR FBAN'KFORT GN-THE-MAIN, GERMANY, AND

EMANUEL EUR, 01? MANCHESTER, ENGLAND.

'rnocnss or rrmsrrrrre MATERIALS mum WITH VAT coLor ts.

LQWLMML.

We Drawing.

To all whom it may concern:

Be it known that we, ADoLF Knnrnsz, a subject of the King of Hungary, residing at Bismarckstrasse- 5, Mainkur, near Frankfort-on-theMain, Germany, and EMANUEL KUR, a subject of the United Kingdom of Great Britain and Ireland, residing at 10 Dolefield Bridge street, Manchester, England, have invented certain new and useful Improvements in Processes of Finishing Materials Dyed with Vat Colors, of which the following is a full description. I

It frequently happens that materials dyed withvat'colors bleed when being washed in a strongly alkaline bath in spite of the fact that the dyeings themselves are faultless in respect of fastness to washing. Tests which have been carried out have now shown that the bleeding is in the majority of cases to be attributed solely to the finish used, dextrin, glucose and similar substances having been employed which exercise a reducing efl'ect on the colors in a hot alkaline washing bath. According to this invention a salt which prevents such reduction of the vat colors to soluble bodies is added to the reducing finish. Materials finished in this manner possess incomparably better fastness to washing than those finished as heretofore and may 'be washed hot without bleeding. The salts whichhave been found filpecificatio'n of'ltetters Patent.

Patented Dec. a, rule,

Application filed March is, 1915. Seria 11to.15,295.

suitable for such purpose are the sulfates, chlorids jand nitrates ofthe heavy metals monochromates, bi'chromates, chlorates and bromates, as well as certain nitro products of organic substances. For example, 1 gram" sulfate of copper, and 3 grams bichromate of potassium maybe added to each liter of an ordinary dextri'n finish which may then be applied either. to fabrics or to yarns .40

Having now particularly described and j ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is The herein described process of finishing fabrics dyed with a vat color by preparing a finishing paste with dextrin, adding an oxidizing salt, and applying the'mixture to the dyed fabric.

-In witness whereof we have hereunto 5o signed our names this 16th day of February,

1915, in the presence of the subscribing wit- IlGSSGS.

ADOLF KERTESZ. EMANUEL KUR.

Witnesses as to Adolf Kerteszi JEAN GRUND, CARL GRUND;

'Witnesses as to Emanuel Kur: ERNALD SIMPSON MosELEY, MALCOLM SMITHURST. 

